Recent content by dvsumosize

yeah

I see.

Cramster tells me what i did at the beginning was right, distance doesn't matter in this case. Why did none of you tell me so?

Which formula from that law will i use, the only one i know is the E = Sigma/(2 * e-not)

Homework Statement 3 Infinitely large non conductiong sheets are uniformly charged with surface charge densities Sigma1 = +2x10^-6c/m^2, Sigma2 = +4x10^-6c/m^2, Sigma3 = -5.0x10^-6c/m^2. Distance L = 1.6cm. What is the magnitude and direction of the net electric field at point P...

bah i figured it out i said the rock had a radius of 3 inches converted that into mm^2 and multiplied by 120 to get N then * that by 6 mm to get work done over that interval and then added my previous result.

i just found the tensile strength roughly of safety glass and it is 120 to 200 N/sq .mm. How do i find the energy required to break through that?

Homework Statement This happened in real life, rock breaks through single pane safety glass and travels 9 meters, safety glass is 3 meters high. rock was 1 kg. I need to find the rough KE before the rock hit the glass. The MPa of the glass i am guessing is 50, google has yielded me little on...

as it turns out the T = 110, our professor told us he forgot to include that. :<

to find the Net x Force for T or W2 i know this equation is to be used: (-) T cos 40 + W2 Cos Alpha = 0 And when it comes to the Net y Forces, this equation is used: T sin 40 + W2 sin alpha = 220 but my problem is still finding that alpha, after i do i can just substitute and solve. But so...

It is not free to move and that's the only information given and our professor expects us to solve. The T line is 40 degrees from horizontal axis, the W2 line is alpha degrees, it is a tension problem so the lines cannot stretch or bend, all the Forces just have to have net of 0. The exact...

Homework Statement Find Tension T and w2 in each cable in diagram. Diagram: http://i52.tinypic.com/8z33ub.jpg (i drew this in paint, sorry if it looks bad)Homework Equations only basic algebra is neededThe Attempt at a Solution To find T and w2 i need to find angle Alpha but i cannot seem to...